diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index b1a05c748718..48f1464b2184 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,12 @@
+2019-01-06  Jonathan Wakely  <jwakely@redhat.com>
+
+	PR libstdc++/88607
+	* testsuite/17_intro/headers/c++1998/charset.cc: New test.
+	* testsuite/17_intro/headers/c++2011/charset.cc: New test.
+	* testsuite/17_intro/headers/c++2014/charset.cc: New test.
+	* testsuite/17_intro/headers/c++2017/charset.cc: New test.
+	* testsuite/17_intro/headers/c++2020/charset.cc: New test.
+
 2019-01-05  Jonathan Wakely  <jwakely@redhat.com>
 
 	* include/bits/fs_fwd.h (__file_clock): Define new clock.
diff --git a/libstdc++-v3/testsuite/17_intro/headers/c++1998/charset.cc b/libstdc++-v3/testsuite/17_intro/headers/c++1998/charset.cc
new file mode 100644
index 000000000000..864c64ef8317
--- /dev/null
+++ b/libstdc++-v3/testsuite/17_intro/headers/c++1998/charset.cc
@@ -0,0 +1,4 @@
+// { dg-options "-finput-charset=ascii" }
+// { dg-do compile }
+
+#include <bits/extc++.h>
diff --git a/libstdc++-v3/testsuite/17_intro/headers/c++2011/charset.cc b/libstdc++-v3/testsuite/17_intro/headers/c++2011/charset.cc
new file mode 100644
index 000000000000..864c64ef8317
--- /dev/null
+++ b/libstdc++-v3/testsuite/17_intro/headers/c++2011/charset.cc
@@ -0,0 +1,4 @@
+// { dg-options "-finput-charset=ascii" }
+// { dg-do compile }
+
+#include <bits/extc++.h>
diff --git a/libstdc++-v3/testsuite/17_intro/headers/c++2014/charset.cc b/libstdc++-v3/testsuite/17_intro/headers/c++2014/charset.cc
new file mode 100644
index 000000000000..864c64ef8317
--- /dev/null
+++ b/libstdc++-v3/testsuite/17_intro/headers/c++2014/charset.cc
@@ -0,0 +1,4 @@
+// { dg-options "-finput-charset=ascii" }
+// { dg-do compile }
+
+#include <bits/extc++.h>
diff --git a/libstdc++-v3/testsuite/17_intro/headers/c++2017/charset.cc b/libstdc++-v3/testsuite/17_intro/headers/c++2017/charset.cc
new file mode 100644
index 000000000000..864c64ef8317
--- /dev/null
+++ b/libstdc++-v3/testsuite/17_intro/headers/c++2017/charset.cc
@@ -0,0 +1,4 @@
+// { dg-options "-finput-charset=ascii" }
+// { dg-do compile }
+
+#include <bits/extc++.h>
diff --git a/libstdc++-v3/testsuite/17_intro/headers/c++2020/charset.cc b/libstdc++-v3/testsuite/17_intro/headers/c++2020/charset.cc
new file mode 100644
index 000000000000..864c64ef8317
--- /dev/null
+++ b/libstdc++-v3/testsuite/17_intro/headers/c++2020/charset.cc
@@ -0,0 +1,4 @@
+// { dg-options "-finput-charset=ascii" }
+// { dg-do compile }
+
+#include <bits/extc++.h>